Variational phase field model for dynamic brittle fracture
|
|
- Nicholas Toby Russell
- 5 years ago
- Views:
Transcription
1 Variational phase field model for dynamic brittle fracture Bleyer J., Roux-Langlois C., Molinari J-F. EMMC 15, September 8th, / 18
2 Outline Mechanisms of dynamic fracture Variational phase-field model of brittle fracture Crack branching in homogeneous medium Crack propagation in heterogeneous medium 1 / 18
3 Crack velocity Limiting crack velocity : in theory, v lim = c R for mode I never attained in experiments, rarely exceed c R seems to depend on experimental setup (geometry, loading conditions) 2 / 18
4 Crack velocity Limiting crack velocity : in theory, v lim = c R for mode I never attained in experiments, rarely exceed c R seems to depend on experimental setup (geometry, loading conditions) explained by crack tip instabilities [Sharon and Fineberg, 1996]: microbranching ( 0.4c R ) : small (1-100 µm in PMMA) short-lived micro-cracks, highly localized mirror, mist, hackle patterns 2 / 18
5 Crack branching Macroscopic branching at even higher velocities [Ramulu and Kobayashi, 1984] [Kobayashi and Mall, 1977] 3 / 18
6 Crack branching Macroscopic branching at even higher velocities [Ramulu and Kobayashi, 1984] [Kobayashi and Mall, 1977] Criterion for branching? question is still open... experiments and numerical simulations seem to exclude a criterion based (only) on crack tip velocity existence of a critical SIF or ERR? 3 / 18
7 Velocity-toughening mechanism Experiments on PMMA report a strong increase of apparent fracture energy with velocity : velocity-toughening mechanism a large part is attributed to an increase of created fracture surface due to microbranching recent experiments show an increase from 400 J/m 2 to J/m 2 between 0.11c R and 0.18c R [Scheibert et al., 2010] 4 / 18
8 Outline Mechanisms of dynamic fracture Variational phase-field model of brittle fracture Crack branching in homogeneous medium Crack propagation in heterogeneous medium 4 / 18
9 Phase-field approach alternative to cohesive elements or XFEM for simulating crack propagation non-local approach : continuous scalar field d(x) representing the crack + a regularization length l 0 [Bourdin et al., 2000] can be formulated as a damage gradient model 5 / 18
10 Phase-field approach alternative to cohesive elements or XFEM for simulating crack propagation non-local approach : continuous scalar field d(x) representing the crack + a regularization length l 0 [Bourdin et al., 2000] can be formulated as a damage gradient model convergence to Griffith theory when l 0 /L 0, at least for quasi-static propagation 5 / 18
11 Phase-field approach Many constitutive modeling choices are possible, we follow [Li et al., 2016] elastic strain energy density : ψ(ε, d) = (1 d) 2 ( κ 2 tr ε + + µε d : ε d) + κ 2 tr ε 6 / 18
12 Phase-field approach Many constitutive modeling choices are possible, we follow [Li et al., 2016] elastic strain energy density : ψ(ε, d) = (1 d) 2 ( κ 2 tr ε + + µε d : ε d) + κ 2 tr ε non-local fracture energy : w frac (d, d) = 3G c 8l 0 ( d + l 2 0 d 2) Remark : existence of an elastic phase for this model 6 / 18
13 Phase-field approach Many constitutive modeling choices are possible, we follow [Li et al., 2016] elastic strain energy density : ψ(ε, d) = (1 d) 2 ( κ 2 tr ε + + µε d : ε d) + κ 2 tr ε non-local fracture energy : w frac (d, d) = 3G c 8l 0 ( d + l 2 0 d 2) Remark : existence of an elastic phase for this model Numerical resolution using a staggered approach : minimization of total energy with respect to u : explicit dynamics minimization with respect to d : quadratic function with bound constraints (d n d n+1 1) to enforce damage irreversibility 6 / 18
14 Outline Mechanisms of dynamic fracture Variational phase-field model of brittle fracture Crack branching in homogeneous medium Crack propagation in heterogeneous medium 6 / 18
15 Prestrained plate geometry Prestrained PMMA plate, fixed boundaries [Zhou, 1996] E = 3.09 GPa, ν = 0.35, ρ = 1180 kg/m 3, G c = 300 J/m 2, c R = 906 m/s 7 / 18
16 Prestrained plate geometry Prestrained PMMA plate, fixed boundaries [Zhou, 1996] E = 3.09 GPa, ν = 0.35, ρ = 1180 kg/m 3, G c = 300 J/m 2, c R = 906 m/s strip geometry Γ = 2E( U) 2 /h crack should accelerate to c R transition from straight propagation to branched patterns apparent toughness increases with loading/crack velocity 7 / 18
17 Prestrained plate geometry (a) U = mm at t = 40 µs (b) U = mm at t = 40 µs (c) U = mm at t = 40 µs (d) U = mm at t = 20 µs 8 / 18
18 Prestrained plate geometry (a) U = mm at t = 40 µs (b) U = mm at t = 40 µs (c) U = mm at t = 40 µs (d) U = mm at t = 20 µs however : branching occurs at smaller load levels than in experiments, crack is too fast same problem with CZM, non-local integral approach 8 / 18
19 Crack velocities no evident decrease of crack speed after branching limiting velocity around 0.68c R 9 / 18
20 Damage zone thickening 10 / 18
21 Damage zone thickening 10 / 18
22 Damage zone thickening 10 / 18
23 Damage zone thickening 10 / 18
24 Damage zone thickening 10 / 18
25 Damage zone thickening 10 / 18
26 Damage zone thickening 10 / 18
27 Damage zone thickening progressive thickening of the damaged band before branching similar observation using peridynamics branching viewed as a progressive transition from a widening crack to two crack tips screening each other branching angle seems to depend on geometry 10 / 18
28 Apparent fracture energy Damage dissipation rate Γ = de frac /da interpreted as the apparent fracture energy 11 / 18
29 Apparent fracture energy Damage dissipation rate Γ = de frac /da interpreted as the apparent fracture energy 11 / 18
30 Apparent fracture energy Damage dissipation rate Γ = de frac /da interpreted as the apparent fracture energy 11 / 18
31 Apparent fracture energy Damage dissipation rate Γ = de frac /da interpreted as the apparent fracture energy suggests a critical value of Γ 2G c associated to branching 11 / 18
32 Velocity-toughening mechanism during propagation and before macroscopic branching 12 / 18
33 Velocity-toughening mechanism during propagation and before macroscopic branching existence of a well-defined Γ(v) relationship associated to a velocity-toughening mechanism 12 / 18
34 Velocity-toughening mechanism the Γ(v) relationship seems material-independent but geometry-dependent 13 / 18
35 Outline Mechanisms of dynamic fracture Variational phase-field model of brittle fracture Crack branching in homogeneous medium Crack propagation in heterogeneous medium 13 / 18
36 Propagation in constrained path experiments report that crack can reach c R if constrained in a weak plane [Washabaugh and Knauss, 1994] Loading U (mm) Stored energy (N/m) Crack velocity (c R ) , , / 18
37 Propagation in constrained path idem for a series of holes on crack path D = 0.4 mm and S = 0.9 mm 15 / 18
38 Propagation in constrained path idem for a series of holes on crack path 15 / 18
39 Propagation in constrained path idem for a series of holes on crack path velocity of 0.9c R for U = 0.05 mm shares qualitative similarities the nucleation and growth of microcracks interacting with defects the apparent fracture energy is much higher than the average toughness G c,weak = (1 D/S)G c 0.56G c 15 / 18
40 Interaction with distant heterogeneities crack passing near a hole 1mm from notch 16 / 18
41 Interaction with distant heterogeneities crack passing near a hole 1mm from notch 6mm from notch 16 / 18
42 Interaction with distant heterogeneities crack passing near a hole 1mm from notch 6mm from notch velocity of the crack tip is larger in the second case crack is more attracted : different near-tip stress fields? faster crack looks for other ways of dissipating energy? 16 / 18
43 Interaction with out-of-plane heterogeneities Configuration with an array of holes located away from the middle plane B = 0.5 mm offset, U = 0.04 mm B = 0.5 mm offset, U = 0.05 mm B = 0.6 mm offset, U = 0.04 mm B = 0.6 mm offset, U = 0.05 mm 17 / 18
44 Conclusions and perspectives Conclusion : some physical aspects of dynamic fracture can be reproduced with the phase-field approach propagation characterized by a damage band widening widening associated to an increase of the apparent fracture energy existence of a well-defined Γ(v) relationship macroscopic branching observed when Γ 2G c existence of a limiting velocity around 0.7c R c R can be reached in constrained geometries strong influence of heterogeneities on branching process 18 / 18
45 Conclusions and perspectives Conclusion : some physical aspects of dynamic fracture can be reproduced with the phase-field approach propagation characterized by a damage band widening widening associated to an increase of the apparent fracture energy existence of a well-defined Γ(v) relationship macroscopic branching observed when Γ 2G c existence of a limiting velocity around 0.7c R c R can be reached in constrained geometries strong influence of heterogeneities on branching process Open questions rate-dependent model for PMMA? energy-based branching criterion? better understanding of 3D effects and role of defects 18 / 18
Cohesive Zone Modeling of Dynamic Fracture: Adaptive Mesh Refinement and Coarsening
Cohesive Zone Modeling of Dynamic Fracture: Adaptive Mesh Refinement and Coarsening Glaucio H. Paulino 1, Kyoungsoo Park 2, Waldemar Celes 3, Rodrigo Espinha 3 1 Department of Civil and Environmental Engineering
More informationInfluence of heterogeneities on crack propagation
Influence of heterogeneities on crack propagation Okan Yılmaz, Jeremy Bleyer, Jean-François Molinari To cite this version: Okan Yılmaz, Jeremy Bleyer, Jean-François Molinari. Influence of heterogeneities
More informationMeasure what is measurable, and make measurable what is not so. - Galileo GALILEI. Dynamic fracture. Krishnaswamy Ravi-Chandar
Measure what is measurable, and make measurable what is not so. - Galileo GALILEI Dynamic fracture Krishnaswamy Ravi-Chandar Lecture 4 presented at the University of Pierre and Marie Curie May, 04 Center
More informationCohesive Band Model: a triaxiality-dependent cohesive model inside an implicit non-local damage to crack transition framework
University of Liège Aerospace & Mechanical Engineering MS3: Abstract 131573 - CFRAC2017 Cohesive Band Model: a triaxiality-dependent cohesive model inside an implicit non-local damage to crack transition
More informationStudies of dynamic crack propagation and crack branching with peridynamics
Int J Fract (2010) 162:229 244 DOI 10.1007/s10704-010-9442-4 ORIGINAL PAPER Studies of dynamic crack propagation and crack branching with peridynamics Youn Doh Ha Florin Bobaru Received: 31 August 2009
More informationLinear Elastic Fracture Mechanics
Measure what is measurable, and make measurable what is not so. - Galileo GALILEI Linear Elastic Fracture Mechanics Krishnaswamy Ravi-Chandar Lecture presented at the University of Pierre and Marie Curie
More informationStudies of Bimaterial Interface Fracture with Peridynamics Fang Wang 1, Lisheng Liu 2, *, Qiwen Liu 1, Zhenyu Zhang 1, Lin Su 1 & Dan Xue 1
International Power, Electronics and Materials Engineering Conference (IPEMEC 2015) Studies of Bimaterial Interface Fracture with Peridynamics Fang Wang 1, Lisheng Liu 2, *, Qiwen Liu 1, Zhenyu Zhang 1,
More informationMICRO-BRANCHING AS AN INSTABILITY IN DYNAMIC FRACTURE. To appear in the proceedings of the IUTAM conference (Cambridge, 1995)
To appear in the proceedings of the IUTAM conference (Cambridge, 1995) MICRO-BRANCHING AS AN INSTABILITY IN DYNAMIC FRACTURE J. FINEBERG, S. P. GROSS AND E. SHARON The Racah Institute of Physics The Hebrew
More informationCohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework
University of Liège Aerospace & Mechanical Engineering Cohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework
More informationFracture mechanics fundamentals. Stress at a notch Stress at a crack Stress intensity factors Fracture mechanics based design
Fracture mechanics fundamentals Stress at a notch Stress at a crack Stress intensity factors Fracture mechanics based design Failure modes Failure can occur in a number of modes: - plastic deformation
More informationThe Meaning, Selection, and Use of the Peridynamic Horizon and Its Relation to Crack Branching in Brittle Materials
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Mechanical & Materials Engineering Faculty Publications Mechanical & Materials Engineering, Department of 2012 The Meaning,
More informationStudies of dynamic crack propagation and crack branching with peridynamics
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Department of Engineering Mechanics Mechanical & Materials Engineering, Department of 2010
More informationKeywords: fracture / crack dynamics / elastodynamics
Bouchaud, Kluwer Academic Publishers, Dordrecht, in press, 001. Page 1. SOME STUDIES OF CRACK DYNAMICS JAMES R. RICE Harvard University Cambridge, MA 0138 USA Abstract Recent developments in fracture dynamics
More informationPERIDYNAMICS WITH ADAPTIVE GRID REFINEMENT
11th World Congress on Computational Mechanics (WCCM XI) 5th European Conference on Computational Mechanics (ECCM V) 6th European Conference on Computational Fluid Dynamics (ECFD VI) E. Oñate, J. Oliver
More informationLecture #7: Basic Notions of Fracture Mechanics Ductile Fracture
Lecture #7: Basic Notions of Fracture Mechanics Ductile Fracture by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering, Chair of Computational Modeling of Materials in Manufacturing
More informationMechanics of Earthquakes and Faulting
Mechanics of Earthquakes and Faulting www.geosc.psu.edu/courses/geosc508 Surface and body forces Tensors, Mohr circles. Theoretical strength of materials Defects Stress concentrations Griffith failure
More informationThe variational approach to fracture: Jean-Jacques Marigo
The variational approach to fracture: main ingredients and some results Jean-Jacques Marigo Ecole Polytechnique, LMS Part I : Griffith theory The classical formulation The extended formulation The issue
More informationStress concentrations, fracture and fatigue
Stress concentrations, fracture and fatigue Piet Schreurs Department of Mechanical Engineering Eindhoven University of Technology http://www.mate.tue.nl/ piet December 1, 2016 Overview Stress concentrations
More informationArchetype-Blending Multiscale Continuum Method
Archetype-Blending Multiscale Continuum Method John A. Moore Professor Wing Kam Liu Northwestern University Mechanical Engineering 3/27/2014 1 1 Outline Background and Motivation Archetype-Blending Continuum
More informationMechanics of Earthquakes and Faulting
Mechanics of Earthquakes and Faulting Lectures & 3, 9/31 Aug 017 www.geosc.psu.edu/courses/geosc508 Discussion of Handin, JGR, 1969 and Chapter 1 Scholz, 00. Stress analysis and Mohr Circles Coulomb Failure
More informationChapter 1 Fracture Physics
Chapter 1 Fracture Physics In this chapter we give a brief account of the theory of fracture, restricting ourselves to brittle fracture. The structure of this chapter is as follows. The first part describes
More informationOn the propagation velocity of a straight brittle crack
On the propagation velocity of a straight brittle crack A. Berezovski 1, G.A. Maugin 2, 1 Centre for Nonlinear Studies, Institute of Cybernetics at Tallinn University of Technology, Akadeemia tee 21, Tallinn
More informationFig. 1. Different locus of failure and crack trajectories observed in mode I testing of adhesively bonded double cantilever beam (DCB) specimens.
a). Cohesive Failure b). Interfacial Failure c). Oscillatory Failure d). Alternating Failure Fig. 1. Different locus of failure and crack trajectories observed in mode I testing of adhesively bonded double
More informationREPORT DOCUMENTATION PAGE
REPORT DOCUMENTATION PAGE Form Approved OMB NO. 0704-0188 The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions,
More informationDevelopment and numerical implementation of an anisotropic continuum damage model for concrete
Development and numerical implementation of an anisotropic continuum damage model for concrete Juha Hartikainen 1, Kari Kolari 2, Reijo Kouhia 3 1 Tampere University of Technology, Department of Civil
More informationModeling of crack initiation, propagation and coalescence in rocks
Modeling of crack initiation, propagation and coalescence in rocks The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation As Published
More informationDevelopment and application of time-lapse ultrasonic tomography for laboratory characterisation of localised deformation in hard soils / soft rocks
Development and application of time-lapse ultrasonic tomography for laboratory characterisation of localised deformation in hard soils / soft rocks Erika Tudisco Research Group: Stephen A. Hall Philippe
More informationExperimentally Calibrating Cohesive Zone Models for Structural Automotive Adhesives
Experimentally Calibrating Cohesive Zone Models for Structural Automotive Adhesives Mark Oliver October 19, 2016 Adhesives and Sealants Council Fall Convention contact@veryst.com www.veryst.com Outline
More informationStress Concentration. Professor Darrell F. Socie Darrell Socie, All Rights Reserved
Stress Concentration Professor Darrell F. Socie 004-014 Darrell Socie, All Rights Reserved Outline 1. Stress Concentration. Notch Rules 3. Fatigue Notch Factor 4. Stress Intensity Factors for Notches 5.
More informationPlanes in Materials. Demirkan Coker Oklahoma State University. March 27, Department of Aerospace Engineering
Dynamic Shear Failure of Weak Planes in Materials Demirkan Coker Oklahoma State University March 27, 2009 Middle East Technical University, Ankara, Turkey Department of Aerospace Engineering Outline 1.
More informationCHAPTER 1 MODELING DYNAMIC FRACTURE USING LARGE-SCALE ATOMISTIC SIMULATIONS
CHAPTER 1 MODELING DYNAMIC FRACTURE USING LARGE-SCALE ATOMISTIC SIMULATIONS Markus J. Buehler Massachusetts Institute of Technology, Department of Civil and Environmental Engineering 77 Massachusetts Avenue
More informationMMJ1133 FATIGUE AND FRACTURE MECHANICS A - INTRODUCTION INTRODUCTION
A - INTRODUCTION INTRODUCTION M.N.Tamin, CSMLab, UTM Course Content: A - INTRODUCTION Mechanical failure modes; Review of load and stress analysis equilibrium equations, complex stresses, stress transformation,
More informationMECHANICS OF 2D MATERIALS
MECHANICS OF 2D MATERIALS Nicola Pugno Cambridge February 23 rd, 2015 2 Outline Stretching Stress Strain Stress-Strain curve Mechanical Properties Young s modulus Strength Ultimate strain Toughness modulus
More informationNumerical Study: Time-Reversed Reciprocal Method and Damage Detection Method for Weld Fracture
Chapter 4 Numerical Study: Time-Reversed Reciprocal Method and Damage Detection Method for Weld Fracture A numerical study is performed to gain insight into applying the proposed method of detecting high-frequency
More informationAlternative numerical method in continuum mechanics COMPUTATIONAL MULTISCALE. University of Liège Aerospace & Mechanical Engineering
University of Liège Aerospace & Mechanical Engineering Alternative numerical method in continuum mechanics COMPUTATIONAL MULTISCALE Van Dung NGUYEN Innocent NIYONZIMA Aerospace & Mechanical engineering
More informationIntroduction to Fracture
Introduction to Fracture Introduction Design of a component Yielding Strength Deflection Stiffness Buckling critical load Fatigue Stress and Strain based Vibration Resonance Impact High strain rates Fracture
More informationCritical applied stresses for a crack initiation from a sharp V-notch
Focussed on: Fracture and Structural Integrity related Issues Critical applied stresses for a crack initiation from a sharp V-notch L. Náhlík, P. Hutař Institute of Physics of Materials, Academy of Sciences
More informationPotential-dependent dynamic fracture of nanoporous gold
Potential-dependent dynamic fracture of nanoporous gold Shaofeng Sun 1, Xiying Chen 1, Nilesh Badwe 1, Karl Sieradzki 1 * 1 Ira A. Fulton School of Engineering, Arizona State University, Tempe, Arizona
More informationDiscrete Element Modelling of a Reinforced Concrete Structure
Discrete Element Modelling of a Reinforced Concrete Structure S. Hentz, L. Daudeville, F.-V. Donzé Laboratoire Sols, Solides, Structures, Domaine Universitaire, BP 38041 Grenoble Cedex 9 France sebastian.hentz@inpg.fr
More informationFracture Mechanics, Damage and Fatigue Linear Elastic Fracture Mechanics - Energetic Approach
University of Liège Aerospace & Mechanical Engineering Fracture Mechanics, Damage and Fatigue Linear Elastic Fracture Mechanics - Energetic Approach Ludovic Noels Computational & Multiscale Mechanics of
More informationAn anisotropic continuum damage model for concrete
An anisotropic continuum damage model for concrete Saba Tahaei Yaghoubi 1, Juha Hartikainen 1, Kari Kolari 2, Reijo Kouhia 3 1 Aalto University, Department of Civil and Structural Engineering 2 VTT 3 Tampere
More informationNUMERICAL INVESTIGATION OF DELAMINATION IN L-SHAPED CROSS-PLY COMPOSITE BRACKET
NUMERICAL INVESTIGATION OF DELAMINATION IN L-SHAPED CROSS-PLY COMPOSITE BRACKET M.Gümüş a*, B.Gözlüklü a, D.Çöker a a Department of Aerospace Eng., METU, Ankara, Turkey *mert.gumus@metu.edu.tr Keywords:
More informationCracking in Quasi-Brittle Materials Using Isotropic Damage Mechanics
Cracking in Quasi-Brittle Materials Using Isotropic Damage Mechanics Tobias Gasch, PhD Student Co-author: Prof. Anders Ansell Comsol Conference 2016 Munich 2016-10-12 Contents Introduction Isotropic damage
More informationFCP Short Course. Ductile and Brittle Fracture. Stephen D. Downing. Mechanical Science and Engineering
FCP Short Course Ductile and Brittle Fracture Stephen D. Downing Mechanical Science and Engineering 001-015 University of Illinois Board of Trustees, All Rights Reserved Agenda Limit theorems Plane Stress
More informationAdvanced Strength of Materials Prof S. K. Maiti Mechanical Engineering Indian Institute of Technology, Bombay. Lecture 27
Advanced Strength of Materials Prof S. K. Maiti Mechanical Engineering Indian Institute of Technology, Bombay Lecture 27 Last time we considered Griffith theory of brittle fracture, where in it was considered
More informationMODELING DYNAMIC FRACTURE AND DAMAGE IN A FIBER-REINFORCED COMPOSITE LAMINA WITH PERIDYNAMICS
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Mechanical & Materials Engineering Faculty Publications Mechanical & Materials Engineering, Department of 011 MODELING DYNAMIC
More informationIntroduction to fracture mechanics
Introduction to fracture mechanics Prof. Dr. Eleni Chatzi Dr. Giuseppe Abbiati, Dr. Konstantinos Agathos Lecture 6-9 November, 2017 Institute of Structural Engineering, ETH Zu rich November 9, 2017 Institute
More informationThermodynamically-Consistent Phase Field Models of Fracture: Variational Principles and Multi-Field FE Implementations
C. Miehe a F. Welschinger a M. Hofacker a Thermodynamically-Consistent Phase Field Models of Fracture: Variational Principles and Multi-Field FE Implementations Stuttgart, August 20, 2009 a Institute of
More informationDamage Mechanics-Based Models for High-Cycle Fatigue Life Prediction of Metals
Damage Mechanics-Based Models for High-Cycle Fatigue Life Prediction of Metals H.A.F. Argente dos Santos (Postdoc Fellow) Dipartimento di Meccanica Strutturale Università degli Studi di Pavia Pavia, December
More informationPowerful Modelling Techniques in Abaqus to Simulate
Powerful Modelling Techniques in Abaqus to Simulate Necking and Delamination of Laminated Composites D. F. Zhang, K.M. Mao, Md. S. Islam, E. Andreasson, Nasir Mehmood, S. Kao-Walter Email: sharon.kao-walter@bth.se
More informationPhase-field modeling of the coupled microstructure and fracture evolution in ferroelectric single crystals
Phase-field modeling of the coupled microstructure and fracture evolution in ferroelectric single crystals Amir Abdollahi, Irene Arias LaCàN, Universitat Politècnica de Catalunya (UPC), Campus Nord UPC-C2,
More informationEvolution of Tenacity in Mixed Mode Fracture Volumetric Approach
Mechanics and Mechanical Engineering Vol. 22, No. 4 (2018) 931 938 c Technical University of Lodz Evolution of Tenacity in Mixed Mode Fracture Volumetric Approach O. Zebri LIDRA Laboratory, Research team
More informationDelamination Modeling for Power Packages and Modules. Rainer Dudek, R. Döring, S. Rzepka Fraunhofer ENAS, Micro Materials Center Chemnitz
Delamination Modeling for Power Packages and Modules Rainer Dudek, R. Döring, S. Rzepka Fraunhofer ENAS, Micro Materials Center Chemnitz The Micro Materials Center @ Virtual Prototyping Finite Element
More informationCrack Front Waves in Dynamic Fracture
International Journal of Fracture 119: 247 261, 2003. 2003 Kluwer Academic Publishers. Printed in the Netherlands. Crack Front Waves in Dynamic Fracture J. FINEBERG 1,, E. SHARON 2 and G. COHEN 1 1 The
More informationFault Representation Methods for Spontaneous Dynamic Rupture Simulation. Luis A. Dalguer
Fault Representation Methods for Spontaneous Dynamic Rupture Simulation Luis A. Dalguer Computational Seismology Group Swiss Seismological Service (SED) ETH-Zurich July 12-18, 2011 2 st QUEST Workshop,
More informationCracks Jacques Besson
Jacques Besson Centre des Matériaux UMR 7633 Mines ParisTech PSL Research University Institut Mines Télécom Aγνωστ oς Θεoς Outline 1 Some definitions 2 in a linear elastic material 3 in a plastic material
More informationExamination in Damage Mechanics and Life Analysis (TMHL61) LiTH Part 1
Part 1 1. (1p) Define the Kronecker delta and explain its use. The Kronecker delta δ ij is defined as δ ij = 0 if i j 1 if i = j and it is used in tensor equations to include (δ ij = 1) or "sort out" (δ
More informationEXPERIMENTAL STUDY OF THE OUT-OF-PLANE DISPLACEMENT FIELDS FOR DIFFERENT CRACK PROPAGATION VELOVITIES
EXPERIMENTAL STUDY OF THE OUT-OF-PLANE DISPLACEMENT FIELDS FOR DIFFERENT CRACK PROPAGATION VELOVITIES S. Hédan, V. Valle and M. Cottron Laboratoire de Mécanique des Solides, UMR 6610 Université de Poitiers
More informationDirect Comparison of Anisotropic Damage Mechanics to Fracture Mechanics of Explicit Cracks
Direct Comparison of Anisotropic Damage Mechanics to Fracture Mechanics of Explicit Cracks John A. Nairn Wood Science and Engineering, Oregon State University, Corvallis, OR 97330, USA Tel: +1-541-737-4265
More informationNumerical modeling of sliding contact
Numerical modeling of sliding contact J.F. Molinari 1) Atomistic modeling of sliding contact; P. Spijker, G. Anciaux 2) Continuum modeling; D. Kammer, V. Yastrebov, P. Spijker pj ICTP/FANAS Conference
More informationAfter lecture 16 you should be able to
Lecture 16: Design of paper and board packaging Advanced concepts: FEM, Fracture Mechanics After lecture 16 you should be able to describe the finite element method and its use for paper- based industry
More informationTentamen/Examination TMHL61
Avd Hållfasthetslära, IKP, Linköpings Universitet Tentamen/Examination TMHL61 Tentamen i Skademekanik och livslängdsanalys TMHL61 lördagen den 14/10 2000, kl 8-12 Solid Mechanics, IKP, Linköping University
More informationSUPPLEMENTARY INFORMATION
Supplementary material How things break under shear and tension? How does a crack propagate in three dimensions when a material is both under tension and sheared parallel to the crack front? Numerous experimental
More informationWhat we should know about mechanics of materials
What we should know about mechanics of materials 0 John Maloney Van Vliet Group / Laboratory for Material Chemomechanics Department of Materials Science and Engineering Massachusetts Institute of Technology
More informationOn materials destruction criteria. L.S.Kremnev.
On materials destruction criteria. L.S.Kremnev. Moscow State Technological University "STANKIN", Moscow, Russia, Kremnevls@yandex.ru. Abstract. In terms of nonlinear material fracture mechanics, the real
More informationModel-independent approaches for the XFEM in fracture mechanics
Model-independent approaches for the XFEM in fracture mechanics Safdar Abbas 1 Alaskar Alizada 2 and Thomas-Peter Fries 2 1 Aachen Institute for Computational Engineering Science (AICES), RWTH Aachen University,
More informationG1RT-CT A. BASIC CONCEPTS F. GUTIÉRREZ-SOLANA S. CICERO J.A. ALVAREZ R. LACALLE W P 6: TRAINING & EDUCATION
A. BASIC CONCEPTS 6 INTRODUCTION The final fracture of structural components is associated with the presence of macro or microstructural defects that affect the stress state due to the loading conditions.
More informationEmergent properties in interface mechanical problems:
IMT Institute for Advanced Studies March 5, 2013, Lucca, Italy Emergent properties in interface mechanical problems: A paradigm of organized complexity Dr. Ing. Marco Paggi Politecnico di Torino Centre
More informationA TIME-DEPENDENT DAMAGE LAW IN DEFORMABLE SOLID: A HOMOGENIZATION APPROACH
9th HSTAM International Congress on Mechanics Limassol, Cyprus, - July, A TIME-DEPENDENT DAMAGE LAW IN DEFORMABLE SOLID: A HOMOGENIZATION APPROACH Cristian Dascalu, Bertrand François, Laboratoire Sols
More informationPROPAGATION OF CURVED CRACKS IN HOMOGENEOUS AND GRADED MATERIALS
PROPAGATION OF CURVED CRACKS IN HOMOGENEOUS AND GRADED MATERIALS Abstract Matthew T. Tilbrook, Robert J. Moon and Mark Hoffman School of Materials Science and Engineering University of New South Wales,
More informationMechanics of Earthquakes and Faulting
Mechanics of Earthquakes and Faulting www.geosc.psu.edu/courses/geosc508 Overview Milestones in continuum mechanics Concepts of modulus and stiffness. Stress-strain relations Elasticity Surface and body
More informationCrack dynamics in elastic media
PHILOSOPHICAL MAGAZINE B, 1998, VOL. 78, NO. 2, 97± 102 Crack dynamics in elastic media By Mokhtar Adda-Bedia and Martine Ben Amar Laboratoire de Physique Statistique de l Ecole Normale Supe  rieure,
More informationRock Failure. Topics. Compressive Strength Rock Strength from Logs Polyaxial Strength Criteria Anisotropic Rock Strength Tensile Strength
Rock Failure Topics Compressive Strength Rock Strength from Logs Polyaxial Strength Criteria Anisotropic Rock Strength Tensile Strength Key Points 1. When rock fails in compression, the compressive stress
More informationDevelopment of X-FEM methodology and study on mixed-mode crack propagation
Acta Mech. Sin. (2011) 27(3):406 415 DOI 10.1007/s10409-011-0436-x RESEARCH PAPER Development of X-FEM methodology and study on mixed-mode crack propagation Zhuo Zhuang Bin-Bin Cheng Received: 2 February
More informationA RATE-DEPENDENT MULTI-SCALE CRACK MODEL FOR CONCRETE
VIII International Conference on Fracture echanics of Concrete and Concrete Structures FraCoS-8 J.G.. Van ier, G. Ruiz, C. Andrade, R.C. Yu and X.X. Zhang (Eds) A RATE-DEPENDENT ULTI-SCALE CRACK ODEL FOR
More informationPeridynamic model for dynamic fracture in unidirectional fiber-reinforced composites
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Mechanical & Materials Engineering Faculty Publications Mechanical & Materials Engineering, Department of 4-2012 Peridynamic
More informationSKIN-STRINGER DEBONDING AND DELAMINATION ANALYSIS IN COMPOSITE STIFFENED SHELLS
SKIN-STRINER DEBONDIN AND DELAMINATION ANALYSIS IN COMPOSITE STIFFENED SHELLS R. Rikards, K. Kalnins & O. Ozolinsh Institute of Materials and Structures, Riga Technical University, Riga 1658, Latvia ABSTRACT
More informationNumerical modeling of standard rock mechanics laboratory tests using a finite/discrete element approach
Numerical modeling of standard rock mechanics laboratory tests using a finite/discrete element approach S. Stefanizzi GEODATA SpA, Turin, Italy G. Barla Department of Structural and Geotechnical Engineering,
More informationMacroscopic Failure Analysis Based on a Random Field Representations Generated from Material Microstructures
Macroscopic Failure Analysis Based on a Random Field Representations Generated from Material Microstructures Reza Abedi Mechanical, Aerospace & Biomedical Engineering University of Tennessee Knoxville
More informationNumerical implementation of the incubation time fracture criterion
Journal of Physics: Conference Series PAPER OPEN ACCESS Numerical implementation of the incubation time fracture criterion To cite this article: V A Bratov et al 2015 J. Phys.: Conf. Ser. 653 012049 View
More informationFracture models for elasto-plastic materials as limits of gradient damage models coupled with plasticity: the antiplane case
Fracture models for elasto-plastic materials as limits of gradient damage models coupled with plasticity: the antiplane case Gianni Dal Maso, Gianluca Orlando (SISSA) Rodica Toader (Univ. Udine) R. Toader
More informationICES REPORT July Michael J. Borden, Thomas J.R. Hughes, Chad M. Landis, Clemens V. Verhoosel
ICES REPORT 13-20 July 2013 A higher-order phase-field model for brittle fracture: Formulation and analysis within the isogeometric analysis framework by Michael J. Borden, Thomas J.R. Hughes, Chad M.
More informationMultiscale modeling of failure in ABS materials
Institute of Mechanics Multiscale modeling of failure in ABS materials Martin Helbig, Thomas Seelig 15. International Conference on Deformation, Yield and Fracture of Polymers Kerkrade, April 2012 Institute
More informationEngineering Solid Mechanics
}} Engineering Solid Mechanics 1 (2013) 1-8 Contents lists available at GrowingScience Engineering Solid Mechanics homepage: www.growingscience.com/esm Impact damage simulation in elastic and viscoelastic
More informationEVALUATION OF NONLOCAL APPROACHES FOR MODELLING FRACTURE IN NOTCHED CONCRETE SPECIMENS
VIII International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-8 J.G.M. Van Mier, G. Ruiz, C. Andrade, R.C. Yu and X.X. Zhang (Eds) EVALUATION OF NONLOCAL APPROACHES FOR
More informationMicrocracking, Microcrack-Induced. Delamination, and Longitudinal
NASA Contractor Final Report Microcracking, Microcrack-Induced Delamination, and Longitudinal Splitting of Advanced Composite Structures John A. Nairn University of Utah Salt Lake City, Utah Prepared for
More informationModels for dynamic fracture based on Griffith s criterion
Models for dynamic fracture based on Griffith s criterion Christopher J. Larsen Abstract There has been much recent progress in extending Griffith s criterion for crack growth into mathematical models
More informationFRACTURE MECHANICS OF COMPOSITES WITH RESIDUAL STRESSES, TRACTION-LOADED CRACKS, AND IMPERFECT INTERFACES
Proc. 2 nd ESIS TC4 Conference on Polymers and Composites, in press, 1999 Author prepared reprint FRACTURE MECHANICS OF COMPOSITES WITH RESIDUAL STRESSES, TRACTION-LOADED CRACKS, AND IMPERFECT INTERFACES
More informationOn characterising fracture resistance in mode-i delamination
9 th International Congress of Croatian Society of Mechanics 18-22 September 2018 Split, Croatia On characterising fracture resistance in mode-i delamination Leo ŠKEC *, Giulio ALFANO +, Gordan JELENIĆ
More informationContinuation methods for non-linear analysis
Continuation methods for non-linear analysis FR : Méthodes de pilotage du chargement Code_Aster, Salome-Meca course material GNU FDL licence (http://www.gnu.org/copyleft/fdl.html) Outline Definition of
More informationFatigue and Fracture
Fatigue and Fracture Multiaxial Fatigue Professor Darrell F. Socie Mechanical Science and Engineering University of Illinois 2004-2013 Darrell Socie, All Rights Reserved When is Multiaxial Fatigue Important?
More informationSSRG International Journal of Mechanical Engineering (SSRG-IJME) volume1 issue5 September 2014
Finite Element Modeling for Delamination Analysis of Double Cantilever Beam Specimen Mohammed Waseem H.S. 1, Kiran Kumar N. 2 1 Post Graduate Student, 2 Asst. Professor Dept. of Mechanical Engineering,
More informationarxiv: v2 [cond-mat.mtrl-sci] 25 Jul 2015
Recent developments in dynamic fracture: Some perspectives Jay Fineberg 1 and Eran Bouchbinder 2 1 Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel 2 Chemical Physics
More informationFrontiers of Fracture Mechanics. Adhesion and Interfacial Fracture Contact Damage
Frontiers of Fracture Mechanics Adhesion and Interfacial Fracture Contact Damage Biology, Medicine & Dentistry The Next Frontiers For Mechanics One of the current challenges in materials & mechanics is
More informationMulti-scale digital image correlation of strain localization
Multi-scale digital image correlation of strain localization J. Marty a, J. Réthoré a, A. Combescure a a. Laboratoire de Mécanique des Contacts et des Strcutures, INSA Lyon / UMR CNRS 5259 2 Avenue des
More informationAn Atomistic-based Cohesive Zone Model for Quasi-continua
An Atomistic-based Cohesive Zone Model for Quasi-continua By Xiaowei Zeng and Shaofan Li Department of Civil and Environmental Engineering, University of California, Berkeley, CA94720, USA Extended Abstract
More informationTransactions on Modelling and Simulation vol 10, 1995 WIT Press, ISSN X
Parameters controlling the numerical simulation validity of damageable composite toughness testing S. Yotte, C. Currit, E. Lacoste, J.M. Quenisset Laboratoire de Genie Meanique - IUT 'A\ Domaine Universitaire,
More informationMolecular Dynamics Simulation of Fracture of Graphene
Molecular Dynamics Simulation of Fracture of Graphene Dewapriya M. A. N. 1, Rajapakse R. K. N. D. 1,*, Srikantha Phani A. 2 1 School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
More informationModeling Fracture and Failure with Abaqus
Modeling Fracture and Failure with Abaqus Day 1 Lecture 1 Lecture 2 Lecture 3 Workshop 1 Workshop 2 Basic Concepts of Fracture Mechanics Modeling Cracks Fracture Analysis Crack in a Three-point Bend Specimen
More informationDetermination of Stress Intensity Factor for a Crack Emanating From a Rivet Hole and Approaching Another in Curved Sheet
International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) Determination of Stress Intensity Factor for a Crack Emanating From a Rivet Hole and Approaching Another in Curved Sheet Raghavendra.
More information